Hey all I am wondering how to go about switch from camera 1, 2 or 3 using this 3 Channel Video Switcher Module on ebay here.

Since there's only V+, V- and signal for the "switch" it looks to take a PWM but I am not quite sure if that's correct or not. If correct then how would I (in code) send that out for each camera to change?

UPDATE

Well I've tried the following code:

Code (Text):

int LED_pin = 9; // must be one of 3, 5, 6, 9, 10 or 11 for PWM

void setup() {

pinMode(LED_pin, OUTPUT); // Initialize pin for output

}

void loop() {

int dtwait = 1000; // Pause interval, milliseconds

int V1=20, V2=220, V3=120; // 8-bit output values for PWM duty cycle

analogWrite(LED_pin, V1);

delay(dtwait);

analogWrite(LED_pin, V2);

delay(dtwait);

analogWrite(LED_pin, V3);

delay(dtwait);

}

and just to test it I hooked up 2 green LEDs to digital pin 9 and I can confirm it does light the led's in 3 stages. From bright, medium and then dim-ish.

So I went ahead and powered up the FPV by hooking it up like so:

I'm not getting any voltage off that pin on the FPV. I even hooked up a volt meter and tested it without the LEDs attached to that pin and still had no reading.